Made available in DSpace on 2022-04-28T19:55:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-09-01; In recent years, the productivity of cotton in Brazil has been progressively decreasing, often the result of the reniform nematode Rotylenchulus reniformis. This species can reduce crop productivity by up to 40%. Nematodes can be controlled by nematicides but, because of expense and toxicity, applicatio...